The methods used to build a major bridge for the a5 at Milton Keynes under the main London to Rugby main line are described. The installation sequence, using pipe jacking methods to install two-tier concrete box units under the rail tracks is illustrated. It is the first time large precast units have been jacked one on top of another from opposite sides of a rail track. The abutments and slide-in paths were then constructed prior to the slide-in of the bridge deck. Separate portal framed decks were rolled in, one from each side of the track. The decks were cast on the wingwalls of the bridge. Total track possessions were 52 hours for the first slide-in, requiring excavation of the embankment and 39 hours for the second slide-in. The material under the new bridge was then excavated; abutments and wing walls were faced with brickwork.

  • Availability:
  • Corporate Authors:

    Her Majesty's Stationery Office

    Atlantic Ho, Holborn Viaduct
    London EC1P 1BN,   England 
  • Authors:
    • LANGDON, D
  • Publication Date: 1977-12

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 2-4
  • Serial:
    • Construction
    • Issue Number: 24
    • Publisher: Reed Construction Data
    • ISSN: 0045-3900

Subject/Index Terms

Filing Info

  • Accession Number: 00188329
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • ISBN: 0 11 724427 9
  • Files: ITRD, TRIS
  • Created Date: Feb 27 1979 12:00AM